JP6834695B2 - Resolver stator - Google Patents

Resolver stator Download PDF

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JP6834695B2
JP6834695B2 JP2017068133A JP2017068133A JP6834695B2 JP 6834695 B2 JP6834695 B2 JP 6834695B2 JP 2017068133 A JP2017068133 A JP 2017068133A JP 2017068133 A JP2017068133 A JP 2017068133A JP 6834695 B2 JP6834695 B2 JP 6834695B2
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knock pin
resolver
stator
face
electric motor
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JP2018170909A (en
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健登 竹内
健登 竹内
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Toyota Motor Corp
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Toyota Motor Corp
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Priority to JP2017068133A priority Critical patent/JP6834695B2/en
Priority to CN201810264571.4A priority patent/CN108696087B/en
Priority to US15/939,537 priority patent/US10763731B2/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K24/00—Machines adapted for the instantaneous transmission or reception of the angular displacement of rotating parts, e.g. synchro, selsyn
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/02—Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/08—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/204—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
    • G01D5/2046—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils by a movable ferromagnetic element, e.g. a core
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/204—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
    • G01D5/2073—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils by movement of a single coil with respect to two or more coils
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/225—Detecting coils
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/26—Means for adjusting casings relative to their supports

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mechanical Engineering (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Connection Of Plates (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Description

本発明は、レゾルバのステータに関し、特にその構造に関する。 The present invention relates to a stator of a resolver, particularly to its structure.

電動機のロータなど、軸回りに回転する回転体の回転位置を検出するレゾルバが知られている。例えば、電動機に設けられたレゾルバは、電動機のロータと共に回転するレゾルバロータと、レゾルバロータの周囲に配置され電動機のステータに対して固定的に配置されたレゾルバステータを有する。レゾルバロータのレゾルバステータに対する回転位置を検出することにより、電動機のロータのステータに対する位置を検出することができる。 Resolvers that detect the rotational position of a rotating body that rotates around an axis, such as a rotor of an electric motor, are known. For example, the resolver provided in the electric motor has a resolver rotor that rotates together with the rotor of the electric motor, and a resolver stator that is arranged around the resolver rotor and fixedly arranged with respect to the stator of the electric motor. By detecting the rotational position of the resolver rotor with respect to the resolver stator, the position of the electric motor with respect to the stator can be detected.

レゾルバステータは、電動機のステータが固定された構造体、例えば電動機のケースに固定される。レゾルバステータのケースに対する位置決めに、ノックピンを用いることができる。下記特許文献１には、ノックピン（５０）を用いて電動機ケース（１８）に位置決めされたレゾルバステータ（３０）が示されている。レゾルバステータ（３０）は、ステータコイル（３８）を覆う樹脂製のカバー部材（４０）を有する。カバー部材（４０）には、ノックピン（５０）の後端に対応する位置に、ノックピン（５０）の抜けを防止する止め部（５８）が設けられている。なお、上記の（ ）内の符号は、下記引用文献１で用いられた符号であり、本願の実施形態の説明で用いられる符号とは関連しない。 The resolver stator is fixed to a structure in which the stator of the electric motor is fixed, for example, a case of the electric motor. A knock pin can be used to position the resolver stator with respect to the case. Patent Document 1 below shows a resolver stator (30) positioned on an electric motor case (18) using a knock pin (50). The resolver stator (30) has a resin cover member (40) that covers the stator coil (38). The cover member (40) is provided with a stopper (58) for preventing the knock pin (50) from coming off at a position corresponding to the rear end of the knock pin (50). The reference numerals in parentheses above are the reference numerals used in the following cited document 1 and are not related to the reference numerals used in the description of the embodiments of the present application.

特開２０１５−０２３６２２号公報JP 2015-023622

レゾルバステータのコアに隣接する金属製の部材、例えばコアを覆う金属製のカバーを設け、この部材でノックピンの抜けを防止する場合、この部材とノックピンの距離が近いと、ノックピンが受信した周囲の電磁ノイズがカバーを介してレゾルバステータのコアに進入し、レゾルバの出力信号にノイズが混入することがあった。 When a metal member adjacent to the core of the resolver stator, for example, a metal cover covering the core is provided and this member prevents the knock pin from coming off, if the distance between this member and the knock pin is short, the surrounding area received by the knock pin is received. Electromagnetic noise sometimes entered the core of the resolver stator through the cover, and noise was mixed in the output signal of the resolver.

本発明は、ノックピンの抜けを防止し、かつノックピンからの電磁ノイズの進入を抑制することを目的とする。 An object of the present invention is to prevent the knock pin from coming off and to suppress the entry of electromagnetic noise from the knock pin.

本発明に係る装着対象構造体に装着されるレゾルバステータは、装着対象構造体に設けられた結合穴に挿入されたノックピンに係合する係合溝が設けられたステータコアと、ステータコアのヨーク部を覆う金属製のレゾルバカバーとを有し、レゾルバカバーは、ノックピン端面に対向するノックピン対向部を有し、ノックピン対向部は、ノックピン端面の一部のみに対向し、ノックピンの抜けを防止する、レゾルバステータである。 The resolver stator mounted on the mounting target structure according to the present invention includes a stator core provided with an engaging groove for engaging with a knock pin inserted in a coupling hole provided in the mounting target structure, and a yoke portion of the stator core. The resolver cover has a metal resolver cover to cover, and the resolver cover has a knock pin facing portion facing the knock pin end face, and the knock pin facing portion faces only a part of the knock pin end face to prevent the knock pin from coming off. It is a stator.

本発明に係る装着対象構造体に装着される他のレゾルバステータは、装着対象構造体に設けられた結合穴に挿入されたノックピンに係合する係合溝が設けられたステータコアと、装着対象構造体の裏側から装着対象構造体およびステータコアを貫通するボルトとねじ結合し、装着対象構造体と協働してステータコアを挟持し固定する金属製の固定プレートとを有し、固定プレートは、ノックピン端面に対向するノックピン対向部を有し、ノックピン対向部は、ノックピン端面の一部のみに対向し、ノックピンの抜けを防止する、レゾルバステータである。 Other resolver stators mounted on the mounting target structure according to the present invention include a stator core provided with an engaging groove for engaging with a knock pin inserted in a coupling hole provided in the mounting target structure, and a mounting target structure. It has a metal fixing plate that is screwed from the back side of the body to a bolt that penetrates the mounting target structure and the stator core, and cooperates with the mounting target structure to sandwich and fix the stator core. The fixing plate is a knock pin end face. The knock pin facing portion is a resolver stator having a knock pin facing portion facing the knock pin, and the knock pin facing portion faces only a part of the knock pin end surface to prevent the knock pin from coming off.

また、ノックピン端面の、ノックピン対向部が対向する部分の面積は、ノックピン端面の面積の４０パーセント以下とすることができる。 Further, the area of the knock pin end face where the knock pin facing portion faces is 40% or less of the area of the knock pin end face.

また、ノックピン対向部は、ノックピン端面から離間して配置されるようにできる。 Further, the knock pin facing portion can be arranged so as to be separated from the knock pin end face.

また、ノックピン端面とノックピン対向部の離間距離を、ノックピンの、結合穴に挿入された部分の長さ未満とすることができる。 Further, the distance between the knock pin end face and the knock pin facing portion can be set to be less than the length of the portion of the knock pin inserted into the coupling hole.

ノックピン対向部がノックピン端面の一部のみに対向するようにしたので、ノックピンの抜けを防止しつつ、ノックピンからの電磁ノイズの進入を抑制することができる。 Since the knock pin facing portion faces only a part of the knock pin end face, it is possible to suppress the intrusion of electromagnetic noise from the knock pin while preventing the knock pin from coming off.

本発明に係るレゾルバおよびその周囲の概略構成を示す断面図である。It is sectional drawing which shows the schematic structure of the resolver which concerns on this invention and its surroundings. レゾルバステータおよびその周囲のＡ方向矢視図であり、レゾルバカバーを取り除いた状態を示す図である。It is the A direction arrow view of the resolver stator and its surroundings, and is the figure which shows the state which removed the resolver cover. レゾルバカバーが装着されたレゾルバステータおよびその周囲のＡ方向矢視図である。It is the A direction arrow view of the resolver stator attached with a resolver cover and its surroundings. レゾルバカバーの他の態様を示す図である。It is a figure which shows the other aspect of a resolver cover.

以下、本発明の実施形態を図面に従って説明する。図１は、電動機１０に備えられたレゾルバ１２を示す断面図である。電動機１０は、レゾルバ１２の周囲の構造のみが示されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a resolver 12 provided in the electric motor 10. Only the structure around the resolver 12 of the electric motor 10 is shown.

電動機１０は、電動機ロータ１４と、電動機ロータ１４を取り囲むように配置される電動機ステータ１６を有する。電動機ロータ１４は、電動機１０の出力軸となるロータシャフト１８と結合され、両者は一体となって回転する。電動機ロータ１４および電動機ステータ１６は、共に電動機ケース２０内に収められている。電動機ケース２０は、ロータシャフト１８を回転可能に支持する軸受２２が配置されたエンドケース２４を含む。図１においては、ロータシャフト１８の一端のみが示されているが、他端も軸受により回転可能に支持されている。電動機ステータ１６は、電動機コイル２６と、電動機コイル２６が巻装される電動機ステータコア２８を有し、電動機ケース２０に固定配置される。 The electric motor 10 has an electric motor rotor 14 and an electric motor stator 16 arranged so as to surround the electric motor rotor 14. The electric motor rotor 14 is coupled to a rotor shaft 18 which is an output shaft of the electric motor 10, and both rotate integrally. Both the electric motor rotor 14 and the electric motor stator 16 are housed in the electric motor case 20. The electric motor case 20 includes an end case 24 in which a bearing 22 that rotatably supports the rotor shaft 18 is arranged. Although only one end of the rotor shaft 18 is shown in FIG. 1, the other end is also rotatably supported by bearings. The electric motor stator 16 has an electric motor coil 26 and an electric motor stator core 28 around which the electric motor coil 26 is wound, and is fixedly arranged in the electric motor case 20.

レゾルバ１２は、ロータシャフト１８に固定されたレゾルバロータ３０と、電動機ケース２０、特にエンドケース２４に装着され、固定されるレゾルバステータ３２を有する。レゾルバロータ３０は、楕円形の板形状を有し、この楕円形のレゾルバロータ３０の回転中心は、ロータシャフト１８の回転軸線上に位置する。ロータシャフト１８が回転すると、レゾルバロータ３０も一体となって回転する。レゾルバロータ３０は、電磁鋼板を回転軸線の方向に積層して形成される。レゾルバステータ３２は、概略円環形状であり、レゾルバロータ３０の外周を取り囲むように配置される。また、レゾルバステータ３２は、エンドケース２４に設けられた複数の円弧壁３４内に収められるように配置される（図２，３参照）。複数の円弧壁３４は、ロータシャフト１８の回転軸線を中心とする同一円周上に配置され、これらの円弧壁３４の内壁面にレゾルバステータ３２の外周側面が接することにより、レゾルバステータ３２の径方向の位置決めがなされる。 The resolver 12 has a resolver rotor 30 fixed to a rotor shaft 18 and a resolver stator 32 mounted and fixed to an electric motor case 20, particularly an end case 24. The resolver rotor 30 has an elliptical plate shape, and the rotation center of the elliptical resolver rotor 30 is located on the rotation axis of the rotor shaft 18. When the rotor shaft 18 rotates, the resolver rotor 30 also rotates integrally. The resolver rotor 30 is formed by laminating electromagnetic steel sheets in the direction of the rotation axis. The resolver stator 32 has a substantially annular shape and is arranged so as to surround the outer circumference of the resolver rotor 30. Further, the resolver stator 32 is arranged so as to be housed in a plurality of arc walls 34 provided in the end case 24 (see FIGS. 2 and 3). The plurality of arc walls 34 are arranged on the same circumference centered on the rotation axis of the rotor shaft 18, and the diameter of the resolver stator 32 is formed by contacting the inner wall surface of these arc walls 34 with the outer peripheral side surface of the resolver stator 32. Directional positioning is done.

レゾルバステータ３２は、円環形状のヨーク部３６およびヨーク部３６の内周から内側に向けて延びるティース３８を有するステータコア４０と、ティース３８に巻き付くように装着されるレゾルバコイル４２とを有する。ステータコア４０は、レゾルバロータ３０の回転軸線の方向に電磁鋼板を積層して形成される。ティース３８は、ヨーク部３６の内周に、周方向に沿って複数個が配置されている。 The resolver stator 32 has a stator core 40 having a ring-shaped yoke portion 36 and teeth 38 extending inward from the inner circumference of the yoke portion 36, and a resolver coil 42 mounted so as to wrap around the teeth 38. The stator core 40 is formed by laminating electromagnetic steel plates in the direction of the rotation axis of the resolver rotor 30. A plurality of teeth 38 are arranged on the inner circumference of the yoke portion 36 along the circumferential direction.

レゾルバコイル４２は、励磁用コイルと２個の検出用コイルの３種のコイルを含む。２個の検出用コイルは、電動機１０の電気角で９０°の間隔を開けて配置された２個のティース３８にそれぞれ装着されている。励磁用コイルに交流電流を印加すると、２個の検出用コイルに電流が誘導される。 The resolver coil 42 includes three types of coils, an exciting coil and two detection coils. The two detection coils are attached to two teeth 38 arranged at an interval of 90 ° at the electric angle of the electric motor 10. When an alternating current is applied to the exciting coil, the current is induced in the two detection coils.

ロータシャフト１８の回転に伴ってレゾルバロータ３０が回転すると、楕円形のレゾルバロータ３０の外周面と、ステータコア４０のティース先端とのギャップが周期的に変化する。このため、検出用コイルに誘導される電流が周期的に変化する。この検出用コイルを流れる電流の変化から、レゾルバステータ３２に対するレゾルバロータ３０の回転位置が算出される。レゾルバステータ３２は電動機ケース２０に固定されており、またレゾルバロータ３０は電動機ロータ１４と一体に回転するので、レゾルバ１２は電動機ケース２０を基準とした電動機ロータ１４の回転位置を検出することができる。 When the resolver rotor 30 rotates with the rotation of the rotor shaft 18, the gap between the outer peripheral surface of the elliptical resolver rotor 30 and the tip of the teeth of the stator core 40 changes periodically. Therefore, the current induced in the detection coil changes periodically. The rotation position of the resolver rotor 30 with respect to the resolver stator 32 is calculated from the change in the current flowing through the detection coil. Since the resolver stator 32 is fixed to the electric motor case 20 and the resolver rotor 30 rotates integrally with the electric motor rotor 14, the resolver 12 can detect the rotational position of the electric motor rotor 14 with respect to the electric motor case 20. ..

レゾルバロータ３０の形状は、前述の楕円に限られず、回転に伴って、その外周側面とステータコア４０のティース先端とのギャップが周期的に変化する形状であればよい。例えば、中心が回転中心からずれて位置する円板形状とすることもできる。 The shape of the resolver rotor 30 is not limited to the ellipse described above, and may be any shape as long as the gap between the outer peripheral side surface thereof and the tip of the teeth of the stator core 40 changes periodically with rotation. For example, it may have a disk shape whose center is located deviated from the center of rotation.

レゾルバコイル４２は、少なくとも一部がコイルケース４４に収容されている。このレゾルバ１２においては、コイルケース４４は、ステータコア４０に沿う円環形状であり、ステータコア４０の表裏に配置される。コイルケース４４は樹脂製とすることができる。 At least a part of the resolver coil 42 is housed in the coil case 44. In the resolver 12, the coil case 44 has an annular shape along the stator core 40 and is arranged on the front and back surfaces of the stator core 40. The coil case 44 can be made of resin.

レゾルバステータ３２のヨーク部３６を覆うように、エンドケース２４の反対側の面にレゾルバカバー４６が配置される。レゾルバカバー４６の材質は金属であり、特に鋼とすることができる。レゾルバカバー４６は、ヨーク部３６に対応した円環板形状であり、内周縁には、コイルケース４４の外周面に当接するフランジ４８が設けられている。また、レゾルバカバー４６とヨーク部３６の外周縁は一致しており、両者共に円弧壁３４の内壁面に当接している。レゾルバカバー４６には、ねじ穴を有するボス部５０が設けられる。ボス部５０のねじ穴には、エンドケース２４の裏面側から貫通するボルト５２のねじ部がねじ結合する。エンドケース２４には、ボルト５２が貫通する貫通孔５４が形成されており、またステータコア４０にもボルト５２が貫通する長穴５６が形成されている（図２参照）。長穴５６は、周方向に延びており、これによりレゾルバステータ３２を周方向にある角度範囲で動かすことができるようにしている。ボルト５２を締めると、ステータコア４０は、レゾルバカバー４６とエンドケース２４に挟持され、電動機ケース２０に固定される。このレゾルバ１２は、３本のボルト５２を用いて固定されている。このように、レゾルバカバー４６は、電動機ケース２０と協働してステータコア４０を挟持し固定する固定プレートとして機能する。 The resolver cover 46 is arranged on the opposite surface of the end case 24 so as to cover the yoke portion 36 of the resolver stator 32. The material of the resolver cover 46 is metal, and in particular, steel can be used. The resolver cover 46 has a ring plate shape corresponding to the yoke portion 36, and a flange 48 that abuts on the outer peripheral surface of the coil case 44 is provided on the inner peripheral edge. Further, the outer peripheral edges of the resolver cover 46 and the yoke portion 36 are aligned, and both are in contact with the inner wall surface of the arc wall 34. The resolver cover 46 is provided with a boss portion 50 having a screw hole. The screw portion of the bolt 52 penetrating from the back surface side of the end case 24 is screwed into the screw hole of the boss portion 50. The end case 24 is formed with a through hole 54 through which the bolt 52 penetrates, and the stator core 40 is also formed with an elongated hole 56 through which the bolt 52 penetrates (see FIG. 2). The elongated hole 56 extends in the circumferential direction so that the resolver stator 32 can be moved in a certain angular range in the circumferential direction. When the bolt 52 is tightened, the stator core 40 is sandwiched between the resolver cover 46 and the end case 24 and fixed to the electric motor case 20. The resolver 12 is fixed by using three bolts 52. In this way, the resolver cover 46 functions as a fixing plate for sandwiching and fixing the stator core 40 in cooperation with the electric motor case 20.

図２および図３は、レゾルバステータ３２およびその周囲を図１に示す矢印Ａの方向に視た状態を示す図である。図２は、レゾルバカバー４６を取り除いた状態を示している。以下においては、図１と、図２，３を参照して説明する。 2 and 3 are views showing a state in which the resolver stator 32 and its surroundings are viewed in the direction of arrow A shown in FIG. FIG. 2 shows a state in which the resolver cover 46 is removed. In the following, it will be described with reference to FIGS. 1 and 2 and 3.

ステータコア４０には、エンドケース２４に立設されたノックピン５８と係合する係合溝６０が設けられている。係合溝６０は、ヨーク部３６の外周縁から径方向内側に向けて形成され、またヨーク部３６の厚さ方向（電動機ロータの回転軸線に沿う方向）全体にわたって設けられている。ノックピン５８は、エンドケース２４に設けられた結合穴６２に挿入され、エンドケース２４に一端が突出した立設された状態にある。ノックピン５８は円柱形状を有し、材質は、金属であり、特に鋼とすることができる。ノックピン５８と係合溝６０の周方向の寸法は、隙間を有するように設定されている。これにより、ボルト５２を若干緩め、レゾルバステータ３２を仮止めした状態で、レゾルバステータ３２を周方向に若干動かせるようにしている。これにより、レゾルバステータ３２の周方向位置の微調整を可能としている。 The stator core 40 is provided with an engaging groove 60 that engages with the knock pin 58 erected on the end case 24. The engaging groove 60 is formed from the outer peripheral edge of the yoke portion 36 toward the inside in the radial direction, and is provided over the entire thickness direction of the yoke portion 36 (direction along the rotation axis of the motor rotor). The knock pin 58 is inserted into a coupling hole 62 provided in the end case 24, and is in an upright state in which one end protrudes from the end case 24. The knock pin 58 has a cylindrical shape, and the material is metal, and in particular, steel can be used. The circumferential dimensions of the knock pin 58 and the engagement groove 60 are set so as to have a gap. As a result, the bolt 52 is slightly loosened so that the resolver stator 32 can be slightly moved in the circumferential direction while the resolver stator 32 is temporarily fixed. This makes it possible to finely adjust the position of the resolver stator 32 in the circumferential direction.

レゾルバカバー４６の、ノックピン５８および係合溝６０に対応する位置には、外周縁から内側に向けて切り欠き６４が設けられている。切り欠き６４の底縁６４ａは周方向に延び、切り欠き６４は、底縁６４ａがノックピン５８の端面５８ａを横切るように形成されている。これにより、ノックピン端面５８ａの一部にレゾルバカバー４６が対向し、他の部分ではノックピン端面５８ａがレゾルバカバー４６に覆われずに開放されている。言い換えれば、レゾルバカバー４６のノックピンに対向する部分（ノックピン対向部）は、ノックピン端面５８ａの一部のみに対向している。 A notch 64 is provided on the resolver cover 46 from the outer peripheral edge to the inside at a position corresponding to the knock pin 58 and the engaging groove 60. The bottom edge 64a of the notch 64 extends in the circumferential direction, and the notch 64 is formed so that the bottom edge 64a crosses the end face 58a of the knock pin 58. As a result, the resolver cover 46 faces a part of the knock pin end face 58a, and the knock pin end face 58a is opened without being covered by the resolver cover 46 in other parts. In other words, the portion of the resolver cover 46 facing the knock pin (knock pin facing portion) faces only a part of the knock pin end surface 58a.

レゾルバカバー４６がノックピン端面５８ａに対向していることにより、ノックピン５８が結合穴６２から抜けることを防止している。ノックピン５８は、圧入により結合穴６２に固定されたとしても、条件によっては、抜けることが考えられる。例えば、電動機ケース２０がアルミ合金製、ノックピン５８が一般的な鋼製である場合、電動機の発熱による熱膨張によって、ノックピン５８がすきまばめの状態となる場合がある。アルミ合金の熱膨張率は、一般鋼のそれより大きく、高温になると、結合穴６２の内径がノックピン５８の外径より大きく膨張する。このため、これらのはめあい寸法が、しまりばめ状態から、すきまばめ状態となって緩み、ノックピン５８が抜ける可能性がある。電動機１０が車両に搭載されるものである場合、車両の振動によってもノックピンが緩む場合がある。これらのノックピン５８の抜けに対し、レゾルバカバー４６にノックピン端面５８ａに対向する部分を設けることにより、この部分でノックピン５８の端を押さえ、抜けを防止できる。ノックピン端面５８ａと、これに対向するレゾルバカバー４６の離間距離が、ノックピン５８が結合穴６２に埋め込まれる深さ未満とすることにより、ノックピン５８の抜けを防止できる。 Since the resolver cover 46 faces the knock pin end surface 58a, the knock pin 58 is prevented from coming out of the coupling hole 62. Even if the knock pin 58 is fixed to the coupling hole 62 by press fitting, it may come off depending on the conditions. For example, when the electric motor case 20 is made of aluminum alloy and the knock pin 58 is made of general steel, the knock pin 58 may be in a crevice-fitted state due to thermal expansion due to heat generated by the electric motor. The coefficient of thermal expansion of the aluminum alloy is larger than that of general steel, and at high temperatures, the inner diameter of the coupling hole 62 expands larger than the outer diameter of the knock pin 58. Therefore, there is a possibility that these fitting dimensions will loosen from the tight-fitting state to the crevice-fitting state, and the knock pin 58 may come off. When the electric motor 10 is mounted on a vehicle, the knock pin may loosen due to the vibration of the vehicle. By providing the resolver cover 46 with a portion facing the knock pin end surface 58a to prevent the knock pin 58 from coming off, the end of the knock pin 58 can be pressed by this portion to prevent the knock pin 58 from coming off. By setting the distance between the knock pin end face 58a and the resolver cover 46 facing the knock pin end surface 58a to be less than the depth at which the knock pin 58 is embedded in the coupling hole 62, the knock pin 58 can be prevented from coming off.

レゾルバ１２の周囲に配置された電動機コイル２６に電流が流れると周囲に変動する磁界が発生し、この磁界が、ステータコア４０内に誘起される磁束に影響を与える場合がある。レゾルバカバー４６が金属製であることで、電動機１０による外部の磁界をある程度遮蔽することができる。一方で、ノックピン５８がアンテナのように機能し、外部の磁界によるノイズを増幅する場合があり、このノイズがレゾルバカバー４６を介してステータコア４０に進入することがある。このノイズは、電動機ロータ１４の回転位置の検出の精度を低下させる。 When a current flows through the motor coil 26 arranged around the resolver 12, a magnetic field that fluctuates in the surroundings is generated, and this magnetic field may affect the magnetic flux induced in the stator core 40. Since the resolver cover 46 is made of metal, the external magnetic field generated by the electric motor 10 can be shielded to some extent. On the other hand, the knock pin 58 may function like an antenna and amplify noise due to an external magnetic field, and this noise may enter the stator core 40 via the resolver cover 46. This noise reduces the accuracy of detecting the rotational position of the motor rotor 14.

このレゾルバ１２においては、レゾルバカバー４６がノックピン端面５８ａの一部にのみ対向していることにより、ノイズの進入を少なくしている。レゾルバカバー４６とノックピン端面５８ａが対向する面積が小さいため、ノックピン端面５８ａの全体に対向している場合に比べ、ノックピン５８からレゾルバカバー４６に進入するノイズを低減することができる。ノックピン端面５８ａの、ノックピン対向部が対向する部分の面積は、ノックピン端面５８ａ全体の面積の４０パーセント以下である。また、レゾルバカバー４６は、ノックピン端面５８ａから離間していることが好ましい。離間していることによっても、ノイズの進入が抑制される。 In the resolver 12, the resolver cover 46 faces only a part of the knock pin end face 58a, thereby reducing the ingress of noise. Since the area where the resolver cover 46 and the knock pin end face 58a face each other is small, it is possible to reduce the noise entering the resolver cover 46 from the knock pin 58 as compared with the case where the knock pin end face 58a faces the entire area. The area of the knock pin end face 58a where the knock pin facing portion faces is 40% or less of the total area of the knock pin end face 58a. Further, the resolver cover 46 is preferably separated from the knock pin end surface 58a. The separation also suppresses the ingress of noise.

図４は、ノイズの進入を抑えるための他の態様を示す図である。この態様は、レゾルバカバーの形状が前述のレゾルバカバー４６と異なる。他の構成については前述のものと同様である。この態様のレゾルバカバー６６は、前述の切り欠き６４を設ける代わりに、屈曲されてレゾルバカバー６６の他の部分よりもノックピン端面５８ａからノックピンの軸線方向に離された離間部６８を有する。これにより、ノックピン端面５８ａとレゾルバカバー６６の距離が離れ、離間部６８が形成されていない平らなレゾルバカバーに比べ、ノックピン５８からレゾルバカバー４６に進入するノイズを低減することができる。このときも、ノックピン端面５８ａと、これに対向するレゾルバカバー６６の離間部６８との距離が、ノックピン５８が結合穴６２に埋め込まれる深さ未満とすることにより、ノックピン５８の抜けを防止できる。 FIG. 4 is a diagram showing another aspect for suppressing the ingress of noise. In this aspect, the shape of the resolver cover is different from that of the resolver cover 46 described above. Other configurations are the same as those described above. Instead of providing the notch 64 described above, the resolver cover 66 of this embodiment has a separating portion 68 that is bent and separated from the knock pin end surface 58a in the axial direction of the knock pin than other parts of the resolver cover 66. As a result, the noise entering the resolver cover 46 from the knock pin 58 can be reduced as compared with a flat resolver cover in which the knock pin end surface 58a and the resolver cover 66 are separated from each other and the separation portion 68 is not formed. Also at this time, the knock pin 58 can be prevented from coming off by setting the distance between the knock pin end surface 58a and the separating portion 68 of the resolver cover 66 facing the knock pin end surface 58a to be less than the depth at which the knock pin 58 is embedded in the coupling hole 62.

１０ 電動機、１２ レゾルバ、１４ 電動機ロータ、１６ 電動機ステータ、１８ ロータシャフト、２０ 電動機ケース（装着対象構造体）、２２ 軸受、２４ エンドケース、２６ 電動機コイル、２８ 電動機ステータコア、３０ レゾルバロータ、３２ レゾルバステータ、３４ 円弧壁、３６ ヨーク部、３８ ティース、４０ ステータコア、４２ レゾルバコイル、４４ コイルケース、４６ レゾルバカバー（固定プレート）、４８ フランジ、５０ ボス部、５２ ボルト、５４ 貫通孔、５６ 長穴、５８ ノックピン、５８ａ ノックピン端面、６０ 係合溝、６２ 結合穴、６４ 切り欠き、６４ａ 底縁、６６ レゾルバカバー（固定プレート）、６８ 離間部。 10 motors, 12 resolvers, 14 motor rotors, 16 motor stators, 18 rotor shafts, 20 motor cases (structures to be mounted), 22 bearings, 24 end cases, 26 motor coils, 28 motor stator cores, 30 resolver rotors, 32 resolver stators. , 34 arc wall, 36 yoke part, 38 teeth, 40 stator core, 42 resolver coil, 44 coil case, 46 resolver cover (fixed plate), 48 flange, 50 boss part, 52 bolts, 54 through holes, 56 long holes, 58 Knock pin, 58a Knock pin end face, 60 engagement groove, 62 coupling hole, 64 notch, 64a bottom edge, 66 resolver cover (fixing plate), 68 separator.

Claims (4)

装着対象構造体に装着されるレゾルバステータであって、
装着対象構造体に設けられた結合穴に挿入されたノックピンに係合し、周方向においてノックピンとの間に隙間が形成される係合溝が設けられたステータコアであって、周方向に延びる長穴が形成されたステータコアと、
装着対象構造体の、ステータコアが配置された側とは反対側から、装着対象構造体に設けられた貫通孔およびステータコアの長穴を貫通するよう挿入されたボルトとねじ結合し、装着対象構造体と協働してステータコアを挟持し固定する金属製の固定プレートであって、ノックピン端面に対向するノックピン対向部を有する固定プレートと、
を有し、
ノックピン対向部は、ノックピン端面の一部のみに対向し、ノックピンの抜けを防止する、
レゾルバステータ。 A resolver stator that is mounted on the structure to be mounted.
Engage in is inserted into the coupling hole provided in the mounting structure of interest knock pin, a stator core engaging groove gap is formed is provided between the knock pin in the circumferential direction, the length extending in the circumferential direction A stator core with holes and
From the side of the structure to be mounted, which is opposite to the side where the stator core is arranged , screw-coupled with a bolt inserted so as to penetrate the through hole provided in the structure to be mounted and the elongated hole of the stator core, and the structure to be mounted A metal fixing plate that sandwiches and fixes the stator core in cooperation with the knock pin, and has a knock pin facing portion that faces the knock pin end face.
Have,
The knock pin facing portion faces only a part of the knock pin end face to prevent the knock pin from coming off.
Resolver stator. ノックピン端面の、ノックピン対向部が対向する部分の面積は、ノックピン端面の面積の４０パーセント以下である、請求項１に記載のレゾルバステータ。 The resolver stator according to claim 1, wherein the area of the knock pin end face where the knock pin facing portion faces is 40% or less of the area of the knock pin end face. ノックピン対向部は、ノックピン端面から離間して配置されている、請求項１から２のいずれか１項に記載のレゾルバステータ。 The resolver stator according to any one of claims 1 to 2 , wherein the knock pin facing portion is arranged apart from the knock pin end face. ノックピン端面とノックピン対向部の離間距離が、ノックピンの、結合穴に挿入された部分の長さ未満である、請求項３に記載のレゾルバステータ。 The resolver stator according to claim 3 , wherein the distance between the knock pin end face and the knock pin facing portion is less than the length of the portion of the knock pin inserted into the coupling hole.
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KR20140132436A (en) * 2013-05-07 2014-11-18 삼성전기주식회사 Motor assembly
JP5862615B2 (en) 2013-07-17 2016-02-16 トヨタ自動車株式会社 Resolver stator and its fixing structure
CN104065212A (en) * 2014-07-11 2014-09-24 安徽巨一自动化装备有限公司 Installation structure of novel electric car driving motor rotary transformer
WO2016017342A1 (en) * 2014-07-31 2016-02-04 株式会社Ｔｏｐ Stator and rotating machine
KR101716308B1 (en) * 2015-09-10 2017-03-17 (주)모토닉 Structure for adjusting leading current angle of BLDC motor
CN208430613U (en) * 2018-05-11 2019-01-25 石家庄求实通信设备有限公司 A kind of town road catch-basin equipment having automatic alarm device based on Internet of Things

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JP2018170909A (en) 2018-11-01
US10763731B2 (en) 2020-09-01

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